Answer:
P1 = 7.5 kPa
Explanation:
We can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when temperature is constant. Mathematically, Boyle's Law can be expressed as:
P1 x V1 = P2 x V2
where P1 and V1 are the initial pressure and volume, respectively, and P2 and V2 are the final pressure and volume, respectively.
Substituting the given values, we get:
P1 x 2 L = 300 kPa x 50 mL
Converting 2 liters to milliliters, we have:
P1 x 2000 mL = 300 kPa x 50 mL
Simplifying, we get:
P1 = (300 kPa x 50 mL) / 2000 mL
P1 = 7.5 kPa
Therefore, the original pressure was 7.5 kPa.